Assertion (A) : Alberuni, who visited India at the time of Mahmud of Ghazni, criticised the Hindus for their exclusiveness which kept them away from the rest of the world.Reason (R) : He believed that the caste system was responsible for thus.

• A. Both A and R are true and R is the correct explanation of A
• B. Both A and R are true but R is not a correct explanation of A
• C. A is true bur R is false
• D. A is false but R is true